In SQL server configuration manager-> Is TCP/IP enabled?
Next, does the firewall have an exception for port 1433 to allow inbound connections
Last, On the server, right click server in SQL (properties) and check if there is a checkbox at 'allow remote connections'

Then i assume you have some firewall or port issue somewhere.
I tested it against a running DB server and the screen went black (as expected)

Try to disable the firewall as a whole (and other firewalling software like Symantec Endpoint or MalwareButes)
If this doesnt resolve the issue i begin to think your SQL server is no longer listening to port 1433.

has the Firewall is controlled by the domain this may take a little time but we can try this
if you run connection tests on the SQL server to the SQL datadabe they do work fine which suggest that the SQL is working

Recently we ran in to an issue while running some SQL jobs where we were trying to process the cubes. We got an error saying failure stating 'NT SERVICE\SQLSERVERAGENT does not have access to Analysis Services. So this is a way to automate that wit…